Feature request: Display the font that’s in use rather than the whole font stack

[handcoding]

First of all, I’d like to say that I really like this extension, and I appreciate all your effort that’s gone into it!

Just to put this out there—as a potential feature or option, might it be possible to display the font that’s in use rather than the whole font stack?

I ask because, for example, if you right-click on the GitHub page for this extension, the context menu ends up being enormous because GitHub is using a font stack of “-apple-system, BlinkMacSystemFont, 'Segoe UI’, Helvetica, Arial, sans-serif, 'Apple Color Emoji’, 'Segoe UI Emoji’, 'Segoe UI Symbol’”.

If the extension were able to narrow that down to, say, “-apple-system” (since that’s the font that’s in use), that could make Safari’s context menu more manageable on laptop screens and the like.